fix(mcp): address PR review feedback (P2 + multi-project search)

Two follow-up fixes on the same branch:

1. **Purge sqlite-vec embeddings during project delete** (Codex P2)
   sqlite-vec stores vectors in a vec0 virtual table keyed by chunk rowid
   with no cascade. The previous purge removed search_vector_chunks but
   left the embeddings behind; `_run_vector_query` then keeps returning
   stale vectors that crowd live results.

   ProjectRepository.delete now deletes embeddings first (using the same
   rowid-IN-chunks pattern as SQLiteSearchRepository.delete_project_vector_rows),
   then the chunk rows. Both deletes are skipped if the underlying table
   is absent on a given install. New test test_remove_project_purges_vector_embeddings
   covers the happy path and skips cleanly when the embeddings table
   isn't initialized.

2. **Fix search_all_projects=True on local installs**
   `_search_all_projects` recurses into search_notes with both project=
   and project_id= set. project_id (external UUID) routes through the
   cloud v2 API path, which 401s on local installs because there's no
   JWT to present — so the inner calls silently failed and the merged
   result list stayed empty.

   The fan-out now mirrors get_project_client's cloud_available composite
   (factory mode OR explicit --cloud OR has_cloud_credentials). When that
   composite is false we forward project= only and take the name-routed
   local-ASGI path. Cloud disambiguation still works because the project
   name in project_ref is already the workspace/project qualified_name.

   The existing cloud-style fan-out tests now go through a cloud_routing
   fixture that pins the three signals; a new local_routing test confirms
   project_id is dropped when no cloud route is available.

Signed-off-by: phernandez <paul@basicmachines.co>

src/basic_memory/mcp/tools/search.py

@@ -10,8 +10,13 @@ from loguru import logger
 from fastmcp import Context
 from pydantic import AliasChoices, BeforeValidator, Field
 
-from basic_memory.config import ConfigManager
+from basic_memory.config import ConfigManager, has_cloud_credentials
 from basic_memory.utils import build_canonical_permalink, coerce_dict, coerce_list
+from basic_memory.mcp.async_client import (
+    _explicit_routing,
+    _force_local_mode,
+    is_factory_mode,
+)
 from basic_memory.mcp.container import get_container
 from basic_memory.mcp.project_context import (
     detect_project_from_identifier_prefix,
@@ -479,12 +484,30 @@ async def _search_all_projects(
     total = 0
     any_project_has_more = False
 
+    # Trigger: caller asked for an account-wide search.
+    # Why: project_id (external UUID) routes through the cloud v2 API path,
+    #      which 401s on local installs because there's no JWT to present.
+    #      Project names route through the local-ASGI path and work for both
+    #      backends — cloud disambiguates names via the workspace/project
+    #      qualified_name already baked into project_ref["project"].
+    # Outcome: forward project_id only when the same signals get_project_client
+    #          uses to pick a cloud route are present. Mirrors the cloud_available
+    #          composite in project_context.get_project_client (single source of
+    #          truth for "can we route to cloud?").
+    config = ConfigManager().config
+    use_cloud_routing = (
+        is_factory_mode()
+        or (_explicit_routing() and not _force_local_mode())
+        or has_cloud_credentials(config)
+    )
+
     for project_ref in project_refs:
+        recursive_project_id = project_ref["project_id"] if use_cloud_routing else None
         try:
             results = await search_notes(
                 query=query,
                 project=project_ref["project"],
-                project_id=project_ref["project_id"],
+                project_id=recursive_project_id,
                 page=1,
                 page_size=per_project_page_size,
                 search_type=search_type,

src/basic_memory/repository/project_repository.py

@@ -133,10 +133,15 @@ class ProjectRepository(Repository[Project]):
         inherits the previous tenant's content. search_vector_chunks is a real
         table on both backends but only carries the FK on Postgres.
 
-        search_index is created at runtime by SearchRepository.init_search_index
-        and search_vector_chunks only appears once semantic search initializes,
-        so each table may be absent on minimal test DBs. Inspect first and
-        skip whichever table isn't there.
+        sqlite-vec stores embeddings in a separate vec0 virtual table keyed by
+        chunk rowid with no cascade, so embeddings must be purged before the
+        chunk rows or `_run_vector_query` will keep returning stale vectors
+        that crowd out live results.
+
+        Each derived table — search_index, search_vector_chunks,
+        search_vector_embeddings — is created lazily on first use, so any of
+        them may be absent on minimal test DBs or installs without semantic
+        search. Inspect the connection once and skip whichever is missing.
         """
         async with db.scoped_session(self.session_maker) as session:
             try:
@@ -150,12 +155,29 @@ class ProjectRepository(Repository[Project]):
             existing_tables = await session.run_sync(
                 lambda sync_session: set(sa_inspect(sync_session.connection()).get_table_names())
             )
-            for table in ("search_index", "search_vector_chunks"):
-                if table in existing_tables:
+
+            if "search_index" in existing_tables:
+                await session.execute(
+                    text("DELETE FROM search_index WHERE project_id = :project_id"),
+                    {"project_id": entity_id},
+                )
+
+            if "search_vector_chunks" in existing_tables:
+                if "search_vector_embeddings" in existing_tables:
+                    # sqlite-vec has no CASCADE — drop embeddings first while the
+                    # chunk rows that name them still exist.
                     await session.execute(
-                        text(f"DELETE FROM {table} WHERE project_id = :project_id"),
+                        text(
+                            "DELETE FROM search_vector_embeddings WHERE rowid IN ("
+                            "SELECT id FROM search_vector_chunks "
+                            "WHERE project_id = :project_id)"
+                        ),
                         {"project_id": entity_id},
                     )
+                await session.execute(
+                    text("DELETE FROM search_vector_chunks WHERE project_id = :project_id"),
+                    {"project_id": entity_id},
+                )
 
             await session.delete(project)
             return True

tests/mcp/tools/test_search_notes_multi_project.py

@@ -8,8 +8,38 @@ import pytest
 from basic_memory.schemas.search import SearchItemType, SearchResponse, SearchResult
 
 
+def _stub_routing_mode(monkeypatch, *, cloud: bool) -> None:
+    """Pin the three cloud-route signals search.py reads.
+
+    `_search_all_projects` only forwards project_id (external UUID) when a
+    cloud route is available. The composite mirrors get_project_client:
+    factory mode OR explicit --cloud OR has_cloud_credentials. Tests stub
+    all three so a dev box with OAuth tokens on disk can't bleed into the
+    local-mode case.
+    """
+    search_mod = importlib.import_module("basic_memory.mcp.tools.search")
+    monkeypatch.setattr(search_mod, "is_factory_mode", lambda: False)
+    monkeypatch.setattr(search_mod, "_explicit_routing", lambda: cloud)
+    monkeypatch.setattr(search_mod, "_force_local_mode", lambda: False)
+    monkeypatch.setattr(search_mod, "has_cloud_credentials", lambda config: cloud)
+
+
+@pytest.fixture
+def cloud_routing(monkeypatch):
+    """Force the cloud-routing path for multi-project search tests."""
+    _stub_routing_mode(monkeypatch, cloud=True)
+
+
+@pytest.fixture
+def local_routing(monkeypatch):
+    """Force the local-routing path for multi-project search tests."""
+    _stub_routing_mode(monkeypatch, cloud=False)
+
+
 @pytest.mark.asyncio
-async def test_search_notes_search_all_projects_qualifies_result_permalinks(monkeypatch):
+async def test_search_notes_search_all_projects_qualifies_result_permalinks(
+    monkeypatch, cloud_routing
+):
     """Multi-project search belongs to search_notes and keeps result ids routable."""
     clients_mod = importlib.import_module("basic_memory.mcp.clients")
     search_mod = importlib.import_module("basic_memory.mcp.tools.search")
@@ -169,7 +199,7 @@ async def test_search_notes_search_all_projects_with_no_refs_returns_empty_all_p
 
 @pytest.mark.asyncio
 async def test_search_notes_search_all_projects_continues_after_project_failure(
-    monkeypatch,
+    monkeypatch, cloud_routing
 ):
     """One failing project should not discard successful all-project search results."""
     clients_mod = importlib.import_module("basic_memory.mcp.clients")
@@ -254,3 +284,85 @@ async def test_search_notes_search_all_projects_continues_after_project_failure(
     assert result["total"] == 1
     assert any("team-paul/main" in warning for warning in warnings)
     assert any("team index unavailable" in warning for warning in warnings)
+
+
+@pytest.mark.asyncio
+async def test_search_notes_search_all_projects_local_omits_project_id(
+    monkeypatch, local_routing
+):
+    """Without a cloud route, fan-out must address each project by name only.
+
+    project_id (external UUID) routes through the cloud v2 API path, which
+    returns 401 on local installs because there's no JWT to present. Local
+    fan-out has to fall back to the name-routed path so each per-project
+    search actually returns results instead of silently failing.
+    """
+    clients_mod = importlib.import_module("basic_memory.mcp.clients")
+    search_mod = importlib.import_module("basic_memory.mcp.tools.search")
+
+    project_refs = [
+        {
+            "project": "alpha",
+            "project_id": "11111111-1111-1111-1111-111111111111",
+        },
+        {
+            "project": "beta",
+            "project_id": "22222222-2222-2222-2222-222222222222",
+        },
+    ]
+    searched_projects: list[tuple[str | None, str | None]] = []
+
+    async def fake_load_search_project_refs(context=None):
+        return project_refs
+
+    class StubProject:
+        def __init__(self, name: str | None, external_id: str | None):
+            self.name = name or "main"
+            self.external_id = external_id or "local-main"
+
+    @asynccontextmanager
+    async def fake_get_project_client(project=None, context=None, project_id=None):
+        searched_projects.append((project, project_id))
+        yield object(), StubProject(project, project_id)
+
+    async def fake_resolve_project_and_path(client, identifier, project=None, context=None):
+        return StubProject(project, None), identifier, False
+
+    class MockSearchClient:
+        def __init__(self, client, project_id):
+            self.project_id = project_id
+
+        async def search(self, payload, page, page_size):
+            return SearchResponse(
+                results=[
+                    SearchResult(
+                        title=f"Note in {self.project_id or 'local'}",
+                        permalink="notes/example",
+                        content="",
+                        type=SearchItemType.ENTITY,
+                        score=0.5,
+                        file_path="/notes/example.md",
+                    )
+                ],
+                current_page=page,
+                page_size=page_size,
+                total=1,
+            )
+
+    monkeypatch.setattr(search_mod, "_load_search_project_refs", fake_load_search_project_refs)
+    monkeypatch.setattr(search_mod, "get_project_client", fake_get_project_client)
+    monkeypatch.setattr(search_mod, "resolve_project_and_path", fake_resolve_project_and_path)
+    monkeypatch.setattr(clients_mod, "SearchClient", MockSearchClient)
+
+    result = await search_mod.search_notes(
+        query="anything",
+        search_all_projects=True,
+        output_format="json",
+    )
+
+    assert isinstance(result, dict)
+    assert searched_projects == [("alpha", None), ("beta", None)], (
+        "Local fan-out must omit project_id so the recursive search_notes calls "
+        "take the name-routed path."
+    )
+    assert result["total"] == 2

tests/services/test_project_removal_bug.py

@@ -140,6 +140,16 @@ async def test_remove_project_with_related_entities(project_service: ProjectServ
                         await project_service.repository.delete(project.id)
 
 
+async def _table_exists(session_maker, table: str) -> bool:
+    """Return True if the named table is present on the current connection."""
+    from sqlalchemy import inspect as sa_inspect
+
+    async with db.scoped_session(session_maker) as session:
+        return await session.run_sync(
+            lambda sync_session: table in sa_inspect(sync_session.connection()).get_table_names()
+        )
+
+
 @pytest.mark.asyncio
 async def test_remove_project_purges_search_rows(project_service: ProjectService):
     """Project deletion must sweep the derived search tables.
@@ -242,3 +252,89 @@ async def test_remove_project_purges_search_rows(project_service: ProjectService
             f"search_vector_chunks still has {post_chunks} rows for deleted "
             f"project_id={project_id}."
         )
+
+
+@pytest.mark.asyncio
+async def test_remove_project_purges_vector_embeddings(project_service: ProjectService):
+    """Project deletion must also drop sqlite-vec embeddings keyed by chunk rowid.
+
+    sqlite-vec stores vectors in a vec0 virtual table that has no cascade
+    behavior. If embeddings linger after the chunks they reference are gone,
+    `_run_vector_query` pulls them as top-k candidates and crowds out live
+    results. The test only runs when the embeddings table is present, which
+    matches the install path that exercises semantic search.
+    """
+    test_project_name = f"test-vec-cleanup-{os.urandom(4).hex()}"
+    session_maker = project_service.repository.session_maker
+
+    # The embeddings table only exists once semantic search has initialized.
+    # Skipping when it's absent keeps this test honest on minimal CI DBs.
+    if not await _table_exists(session_maker, "search_vector_embeddings"):
+        pytest.skip("search_vector_embeddings is not present on this connection")
+
+    with tempfile.TemporaryDirectory() as temp_dir:
+        test_project_path = str(Path(temp_dir) / "test-vec-cleanup")
+        os.makedirs(test_project_path, exist_ok=True)
+
+        await project_service.add_project(test_project_name, test_project_path)
+        project = await project_service.get_project(test_project_name)
+        assert project is not None
+        project_id = project.id
+
+        async with db.scoped_session(session_maker) as session:
+            await session.execute(
+                text(
+                    "INSERT INTO search_vector_chunks "
+                    "(id, entity_id, project_id, chunk_key, chunk_text, source_hash, "
+                    " entity_fingerprint, embedding_model) "
+                    "VALUES (:id, :entity_id, :project_id, :chunk_key, :chunk_text, "
+                    " :source_hash, :entity_fingerprint, :embedding_model)"
+                ),
+                {
+                    "id": 999_201,
+                    "entity_id": 999_201,
+                    "project_id": project_id,
+                    "chunk_key": "vec-canary",
+                    "chunk_text": "vec canary",
+                    "source_hash": "abc",
+                    "entity_fingerprint": "",
+                    "embedding_model": "",
+                },
+            )
+            # vec0 requires a vector matching the configured dimensions, but the
+            # delete path filters by rowid; a non-existing dimension would block
+            # this seed step. Skip the insert if the embeddings DDL hasn't run.
+            try:
+                await session.execute(
+                    text(
+                        "INSERT INTO search_vector_embeddings (rowid, embedding) "
+                        "VALUES (:rowid, :embedding)"
+                    ),
+                    {"rowid": 999_201, "embedding": "[" + ",".join(["0.0"] * 384) + "]"},
+                )
+            except Exception:
+                pytest.skip("search_vector_embeddings rejected the synthetic seed row")
+
+        async with db.scoped_session(session_maker) as session:
+            pre = (
+                await session.execute(
+                    text("SELECT COUNT(*) FROM search_vector_embeddings WHERE rowid = :rowid"),
+                    {"rowid": 999_201},
+                )
+            ).scalar_one()
+        assert pre >= 1, "seed embedding should exist before removal"
+
+        await project_service.remove_project(test_project_name)
+
+        async with db.scoped_session(session_maker) as session:
+            post = (
+                await session.execute(
+                    text("SELECT COUNT(*) FROM search_vector_embeddings WHERE rowid = :rowid"),
+                    {"rowid": 999_201},
+                )
+            ).scalar_one()
+
+        assert post == 0, (
+            f"search_vector_embeddings still has {post} rows for rowid 999_201 "
+            "— project deletion did not sweep the sqlite-vec embeddings table."
+        )